Chery A15. Manual - part 238

Section Seven Piston and Connecting Rod Assembly 

 
One. Checking the connecting rod and 
bearing 
(1) Meausre the connecting rod bearing 
clearance with a clearance gauge (Figure 
79). 
 
 
 
 
 
 
 
(2) Lubricate the new bolts with engine 
oil before screwing them on.  
(3) Screw on the bolts.  
(4) Screw on the bolts with a torque of 
26N.m +1/4 turn. Do not use pneumatic 
tools.  
(5) Check the connecting rod side 
clearance with a gauge (Figure 80) (see 
Engine-Specifications).  
 
Two. Check the cylinder cover and 
piston 
1. Measuring 
Clean and blow dry the piston and 
cylinder. Measure the piston diameter in 
90 degree position, or about 14mm (see 
Figure 82 for measurement position).  
 
 
 
 
 
 
 
1-Piston diameter 
2-14mm (9/16 in.) 
 
 
 
 
 
 

 
 
 
 
 
 
 
 

Figure 79 Measure the Connecting Rod 

Bearing Clearance 

 
 
 
 
 
 
 
 
 
 

Figure 80 Measure the Connecting Rod 

Side Clearance 

 
 
 
 
 
 
 
 
 
 

Figure 81 Check the Cylinder 

 
 
 
 
 
 
 

Figure 82 Measurement Position of 

Piston 

 
 

 

 
2. Unfixing 
(1) Please mark the crank shaft bearing 
cover in ink before the piston is unfixed 
(Figure 67).  

 

 
 
 
 
 
 
(2) The piston and connecting rod must 
be unfixed and turn the crank shaft to put 
the connecting rod in the center.  
(3) Unscrew the connecting rod bolts. 
(4) Install connecting rod conduit special 
tools, protect the crank shaft surface 
(Figure 83) and carefully press the piston 
connecting rod assembly to the cylinder.  
(5) Uninstall the special tool, connecting 
rod conduit and screw on the bearing 
cover bolts.  
 
 
1-Special tool connecting rod conduit 
 
 
 
3. Fixing 
(1) Fix the piston ring onto the piston 
(see Engine/Engine Body/Piston ring – 
Fixing). 
(2) Turn the crank shaft and connecting 
rod and lubricate the connecting rod.  
(3) Fix the bearing cover onto the 
connecting rod.  
(4) Fix the special tool of connecting rod 
guide onto the cylinder body (Figure 84).  
(5) After fixing the piston and 
connecting rod, make sure that the 
compression clearance is correct. 
(6) Pour clean engine oil into the piston 
and ring.  
(7) Use the special tool to compress the 
piston ring.  
 

 
 
 
 
 
 
 
 
 
 
 
 
 

Figure 83 Mark of the Connecting Rod 

Big End and Cylinder 

 
 
 
 
 
 
 
 
 
 
 
 
 

Figure 84 Connectring Rod Conduit 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

(8) Fix the piston onto the cylinder and 
mark accordingly (Figure 85).  
(9) Fix the piston into the cylinder 
together with the connecting rod.  
(10) Unfix the conecting rod special tool. 
(11) Fix the connecting rod lower 
bearing cover with a torque of 26N.m 
+1/4 turn.  
1-Mark 
2-Compression ring 
3-Connecting rod conduit special tool 
4. Checking the piston ring clearance 
(Figure 86)  
 
 
 
1. Clearance gauge 
 
 
 
 
 
 
1. Clearance gauge 
 
 
 
 
 
 
 
 
 
 
(1) Check the piston side clearance 
(Figure 87) (see Engine-Specifications). 
5. Unfixing 
(1) Use an expander to unfix the upper 
and middle piston rings (Figure 88).  
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 

Figure 85 Fixing the Piston/Connecting 

Rod 

 
 
 
 
 
 
 
 
 

Figure 86 Piston Ring 

 
 
 
 
 
 
 
 
 
Figure 87 Piston Ring Side Clearance 
 
 
 
 
 
 
 
 
 

Figure 88 Fixing/Unfixing the Piston 

Ring 

 
 

 

 

(2) Unfix upper/lower engine oil ring 
side beam.  

 
 

(3) Clear away the accumulated carbon 
on the piston (Figure 89).  

 
 

1-Piston ring 

 

2-Piston ring 

 

3-Side beam 

 

4-Engine oil ring 

 

5-Engine oil expander 

 

 

 

 

 

 
Note: fix the piston ring 

 
 

 

Figure 89 Fixing the Piston Ring 

 

 

 

 

 

 

 

 

1-Side beam 

 

 

 

 

 

 

 

 

 

 

Figure 90 Piston Ring 

 

 

(4) Fix the the second and the first piston 
rings (Figure 90).  

 
 

(5) Fix the piston ring (Figure91). 

 

 

 

 

 

 

 

1-Lower side beam 

 

2-First piston ring 

 

3-Upper side beam 

 

4-Second piston ring 

 

 

 

 

 

 

 

 

Figure 91